Bill Pringlemeir wrote:
> I have updated the source and recompiled with dmalloc.  This didn't
> catch the problem.  I have several core files and they often mention
> possible stack corruption.  I don't know where to get 'Purify'.  I
> only see a 'Rational Purify' from IBM and it looks like a commercial
> product.

That's what I meant. I don't think they have any competitor. Maybe
such software is even impossible on x86 hardware as the VM protection
isn't fine-grained enough.

> Would electric fence work?  Looks like it also concentrates on
> malloc/free.

It's worth a try, I don't know.

> Could this be an actual stack overflow?  The traces
> always look different.

Possibly, yes. You could try GCC SSP:

        http://www.research.ibm.com/trl/projects/security/ssp/

-- 
Christian

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